﻿/*
 Copyright (c) 2003-2012, CKSource - Frederico Knabben. All rights reserved.
 For licensing, see LICENSE.html or http://ckeditor.com/license
 */

/**
 * @fileOverview The "wysiwygarea" plugin. It registers the "wysiwyg" editing
 *        mode, which handles the main editing area space.
 */

(function () {
    // Matching an empty paragraph at the end of document.
    var emptyParagraphRegexp = /(^|<body\b[^>]*>)\s*<(p|div|address|h\d|center|pre)[^>]*>\s*(?:<br[^>]*>|&nbsp;|\u00A0|&#160;)?\s*(:?<\/\2>)?\s*(?=$|<\/body>)/gi;

    var notWhitespaceEval = CKEDITOR.dom.walker.whitespaces(true),
        notBogus = CKEDITOR.dom.walker.bogus(true),
        notEmpty = function (node) {
            return notWhitespaceEval(node) && notBogus(node);
        };

    // Elements that could blink the cursor anchoring beside it, like hr, page-break. (#6554)
    function nonEditable(element) {
        return element.isBlockBoundary() && CKEDITOR.dtd.$empty[element.getName()];
    }


    function onInsert(insertFunc) {
        return function (evt) {
            if (this.mode == 'wysiwyg') {
                this.focus();

                // Since the insertion might happen from within dialog or menu
                // where the editor selection might be locked at the moment,
                // update the locked selection.
                var selection = this.getSelection(),
                    selIsLocked = selection.isLocked;

                selIsLocked && selection.unlock();

                this.fire('saveSnapshot');

                insertFunc.call(this, evt.data);

                selIsLocked && this.getSelection().lock();

                // Save snaps after the whole execution completed.
                // This's a workaround for make DOM modification's happened after
                // 'insertElement' to be included either, e.g. Form-based dialogs' 'commitContents'
                // call.
                CKEDITOR.tools.setTimeout(function () {
                    this.fire('saveSnapshot');
                }, 0, this);
            }
        };
    }

    function doInsertHtml(data) {
        if (this.dataProcessor)
            data = this.dataProcessor.toHtml(data);

        if (!data)
            return;

        // HTML insertion only considers the first range.
        var selection = this.getSelection(),
            range = selection.getRanges()[0];

        if (range.checkReadOnly())
            return;

        // Opera: force block splitting when pasted content contains block. (#7801)
        if (CKEDITOR.env.opera) {
            var path = new CKEDITOR.dom.elementPath(range.startContainer);
            if (path.block) {
                var nodes = CKEDITOR.htmlParser.fragment.fromHtml(data, false).children;
                for (var i = 0, count = nodes.length; i < count; i++) {
                    if (nodes[i]._.isBlockLike) {
                        range.splitBlock(this.enterMode == CKEDITOR.ENTER_DIV ? 'div' : 'p');
                        range.insertNode(range.document.createText(''));
                        range.select();
                        break;
                    }
                }
            }
        }

        if (CKEDITOR.env.ie) {
            var $sel = selection.getNative();

            // Delete control selections to avoid IE bugs on pasteHTML.
            if ($sel.type == 'Control')
                $sel.clear();
            else if (selection.getType() == CKEDITOR.SELECTION_TEXT) {
                // Due to IE bugs on handling contenteditable=false blocks
                // (#6005), we need to make some checks and eventually
                // delete the selection first.

                range = selection.getRanges()[0];
                var endContainer = range && range.endContainer;

                if (endContainer &&
                    endContainer.type == CKEDITOR.NODE_ELEMENT &&
                    endContainer.getAttribute('contenteditable') == 'false' &&
                    range.checkBoundaryOfElement(endContainer, CKEDITOR.END)) {
                    range.setEndAfter(range.endContainer);
                    range.deleteContents();
                }
            }

            $sel.createRange().pasteHTML(data);
        }
        else
            this.document.$.execCommand('inserthtml', false, data);

        // Webkit does not scroll to the cursor position after pasting (#5558)
        if (CKEDITOR.env.webkit) {
            selection = this.getSelection();
            selection.scrollIntoView();
        }
    }

    function doInsertText(text) {
        var selection = this.getSelection(),
            mode = selection.getStartElement().hasAscendant('pre', true) ?
                CKEDITOR.ENTER_BR : this.config.enterMode,
            isEnterBrMode = mode == CKEDITOR.ENTER_BR;

        var html = CKEDITOR.tools.htmlEncode(text.replace(/\r\n|\r/g, '\n'));

        // Convert leading and trailing whitespaces into &nbsp;
        html = html.replace(/^[ \t]+|[ \t]+$/g, function (match, offset, s) {
            if (match.length == 1)	// one space, preserve it
                return '&nbsp;';
            else if (!offset)		// beginning of block
                return CKEDITOR.tools.repeat('&nbsp;', match.length - 1) + ' ';
            else				// end of block
                return ' ' + CKEDITOR.tools.repeat('&nbsp;', match.length - 1);
        });

        // Convert subsequent whitespaces into &nbsp;
        html = html.replace(/[ \t]{2,}/g, function (match) {
            return CKEDITOR.tools.repeat('&nbsp;', match.length - 1) + ' ';
        });

        var paragraphTag = mode == CKEDITOR.ENTER_P ? 'p' : 'div';

        // Two line-breaks create one paragraph.
        if (!isEnterBrMode) {
            html = html.replace(/(\n{2})([\s\S]*?)(?:$|\1)/g,
                function (match, group1, text) {
                    return '<' + paragraphTag + '>' + text + '</' + paragraphTag + '>';
                });
        }

        // One <br> per line-break.
        html = html.replace(/\n/g, '<br>');

        // Compensate padding <br> for non-IE.
        if (!( isEnterBrMode || CKEDITOR.env.ie )) {
            html = html.replace(new RegExp('<br>(?=</' + paragraphTag + '>)'), function (match) {
                return CKEDITOR.tools.repeat(match, 2);
            });
        }

        // Inline styles have to be inherited in Firefox.
        if (CKEDITOR.env.gecko || CKEDITOR.env.webkit) {
            var path = new CKEDITOR.dom.elementPath(selection.getStartElement()),
                context = [];

            for (var i = 0; i < path.elements.length; i++) {
                var tag = path.elements[i].getName();
                if (tag in CKEDITOR.dtd.$inline)
                    context.unshift(path.elements[i].getOuterHtml().match(/^<.*?>/));
                else if (tag in CKEDITOR.dtd.$block)
                    break;
            }

            // Reproduce the context  by preceding the pasted HTML with opening inline tags.
            html = context.join('') + html;
        }

        doInsertHtml.call(this, html);
    }

    function doInsertElement(element) {
        var selection = this.getSelection(),
            ranges = selection.getRanges(),
            elementName = element.getName(),
            isBlock = CKEDITOR.dtd.$block[elementName];

        var selIsLocked = selection.isLocked;

        if (selIsLocked)
            selection.unlock();

        var range, clone, lastElement, bookmark;

        for (var i = ranges.length - 1; i >= 0; i--) {
            range = ranges[i];

            if (!range.checkReadOnly()) {
                // Remove the original contents, merge splitted nodes.
                range.deleteContents(1);

                clone = !i && element || element.clone(1);

                // If we're inserting a block at dtd-violated position, split
                // the parent blocks until we reach blockLimit.
                var current, dtd;
                if (isBlock) {
                    while (( current = range.getCommonAncestor(0, 1) )
                    && ( dtd = CKEDITOR.dtd[current.getName()] )
                    && !( dtd && dtd [elementName] )) {
                        // Split up inline elements.
                        if (current.getName() in CKEDITOR.dtd.span)
                            range.splitElement(current);
                        // If we're in an empty block which indicate a new paragraph,
                        // simply replace it with the inserting block.(#3664)
                        else if (range.checkStartOfBlock()
                            && range.checkEndOfBlock()) {
                            range.setStartBefore(current);
                            range.collapse(true);
                            current.remove();
                        }
                        else
                            range.splitBlock();
                    }
                }

                // Insert the new node.
                range.insertNode(clone);

                // Save the last element reference so we can make the
                // selection later.
                if (!lastElement)
                    lastElement = clone;
            }
        }

        if (lastElement) {
            range.moveToPosition(lastElement, CKEDITOR.POSITION_AFTER_END);

            // If we're inserting a block element immediately followed by
            // another block element, the selection must be optimized. (#3100,#5436,#8950)
            if (isBlock) {
                var next = lastElement.getNext(notEmpty),
                    nextName = next && next.type == CKEDITOR.NODE_ELEMENT && next.getName();

                // If the next one is a text block, move cursor to the start of it's content.
                if (nextName && CKEDITOR.dtd.$block[nextName]) {
                    if (CKEDITOR.dtd[nextName]['#'])
                        range.moveToElementEditStart(next);
                    // Otherwise move cursor to the before end of the last element.
                    else
                        range.moveToElementEditEnd(lastElement);
                }
                // Open a new line if the block is inserted at the end of parent.
                else if (!next) {
                    next = range.fixBlock(true, this.config.enterMode == CKEDITOR.ENTER_DIV ? 'div' : 'p');
                    range.moveToElementEditStart(next);
                }
            }
        }

        selection.selectRanges([range]);

        if (selIsLocked)
            this.getSelection().lock();
    }

    // DOM modification here should not bother dirty flag.(#4385)
    function restoreDirty(editor) {
        if (!editor.checkDirty())
            setTimeout(function () {
                editor.resetDirty();
            }, 0);
    }

    var isNotWhitespace = CKEDITOR.dom.walker.whitespaces(true),
        isNotBookmark = CKEDITOR.dom.walker.bookmark(false, true);

    function isNotEmpty(node) {
        return isNotWhitespace(node) && isNotBookmark(node);
    }

    function isNbsp(node) {
        return node.type == CKEDITOR.NODE_TEXT
            && CKEDITOR.tools.trim(node.getText()).match(/^(?:&nbsp;|\xa0)$/);
    }

    function restoreSelection(selection) {
        if (selection.isLocked) {
            selection.unlock();
            setTimeout(function () {
                selection.lock();
            }, 0);
        }
    }

    function isBlankParagraph(block) {
        return block.getOuterHtml().match(emptyParagraphRegexp);
    }

    isNotWhitespace = CKEDITOR.dom.walker.whitespaces(true);

    // Gecko need a key event to 'wake up' the editing
    // ability when document is empty.(#3864, #5781)
    function activateEditing(editor) {
        var win = editor.window,
            doc = editor.document,
            body = editor.document.getBody(),
            bodyFirstChild = body.getFirst(),
            bodyChildsNum = body.getChildren().count();

        if (!bodyChildsNum
            || bodyChildsNum == 1
            && bodyFirstChild.type == CKEDITOR.NODE_ELEMENT
            && bodyFirstChild.hasAttribute('_moz_editor_bogus_node')) {
            restoreDirty(editor);

            // Memorize scroll position to restore it later (#4472).
            var hostDocument = editor.element.getDocument();
            var hostDocumentElement = hostDocument.getDocumentElement();
            var scrollTop = hostDocumentElement.$.scrollTop;
            var scrollLeft = hostDocumentElement.$.scrollLeft;

            // Simulating keyboard character input by dispatching a keydown of white-space text.
            var keyEventSimulate = doc.$.createEvent("KeyEvents");
            keyEventSimulate.initKeyEvent('keypress', true, true, win.$, false,
                false, false, false, 0, 32);
            doc.$.dispatchEvent(keyEventSimulate);

            if (scrollTop != hostDocumentElement.$.scrollTop || scrollLeft != hostDocumentElement.$.scrollLeft)
                hostDocument.getWindow().$.scrollTo(scrollLeft, scrollTop);

            // Restore the original document status by placing the cursor before a bogus br created (#5021).
            bodyChildsNum && body.getFirst().remove();
            doc.getBody().appendBogus();
            var nativeRange = new CKEDITOR.dom.range(doc);
            nativeRange.setStartAt(body, CKEDITOR.POSITION_AFTER_START);
            nativeRange.select();
        }
    }

    /**
     *  Auto-fixing block-less content by wrapping paragraph (#3190), prevent
     *  non-exitable-block by padding extra br.(#3189)
     */
    function onSelectionChangeFixBody(evt) {
        var editor = evt.editor,
            path = evt.data.path,
            blockLimit = path.blockLimit,
            selection = evt.data.selection,
            range = selection.getRanges()[0],
            body = editor.document.getBody(),
            enterMode = editor.config.enterMode;

        if (CKEDITOR.env.gecko) {
            activateEditing(editor);

            // Ensure bogus br could help to move cursor (out of styles) to the end of block. (#7041)
            var pathBlock = path.block || path.blockLimit,
                lastNode = pathBlock && pathBlock.getLast(isNotEmpty);

            // Check some specialities of the current path block:
            // 1. It is really displayed as block; (#7221)
            // 2. It doesn't end with one inner block; (#7467)
            // 3. It doesn't have bogus br yet.
            if (pathBlock
                && pathBlock.isBlockBoundary()
                && !( lastNode && lastNode.type == CKEDITOR.NODE_ELEMENT && lastNode.isBlockBoundary() )
                && !pathBlock.is('pre')
                && !pathBlock.getBogus()) {
                pathBlock.appendBogus();
            }
        }

        // When we're in block enter mode, a new paragraph will be established
        // to encapsulate inline contents right under body. (#3657)
        if (editor.config.autoParagraph !== false
            && enterMode != CKEDITOR.ENTER_BR
            && range.collapsed
            && blockLimit.getName() == 'body'
            && !path.block) {
            var fixedBlock = range.fixBlock(true,
                editor.config.enterMode == CKEDITOR.ENTER_DIV ? 'div' : 'p');

            // For IE, we should remove any filler node which was introduced before.
            if (CKEDITOR.env.ie) {
                var first = fixedBlock.getFirst(isNotEmpty);
                first && isNbsp(first) && first.remove();
            }

            // If the fixed block is actually blank and is already followed by an exitable blank
            // block, we should revert the fix and move into the existed one. (#3684)
            if (isBlankParagraph(fixedBlock)) {
                var element = fixedBlock.getNext(isNotWhitespace);
                if (element &&
                    element.type == CKEDITOR.NODE_ELEMENT && !nonEditable(element)) {
                    range.moveToElementEditStart(element);
                    fixedBlock.remove();
                }
                else {
                    element = fixedBlock.getPrevious(isNotWhitespace);
                    if (element &&
                        element.type == CKEDITOR.NODE_ELEMENT && !nonEditable(element)) {
                        range.moveToElementEditEnd(element);
                        fixedBlock.remove();
                    }
                }
            }

            range.select();
            // Cancel this selection change in favor of the next (correct).  (#6811)
            evt.cancel();
        }

        // Browsers are incapable of moving cursor out of certain block elements (e.g. table, div, pre)
        // at the end of document, makes it unable to continue adding content, we have to make this
        // easier by opening an new empty paragraph.
        var testRange = new CKEDITOR.dom.range(editor.document);
        testRange.moveToElementEditEnd(editor.document.getBody());
        var testPath = new CKEDITOR.dom.elementPath(testRange.startContainer);
        if (!testPath.blockLimit.is('body')) {
            var paddingBlock;
            if (enterMode != CKEDITOR.ENTER_BR)
                paddingBlock = body.append(editor.document.createElement(enterMode == CKEDITOR.ENTER_P ? 'p' : 'div'));
            else
                paddingBlock = body;

            if (!CKEDITOR.env.ie)
                paddingBlock.appendBogus();
        }
    }

    CKEDITOR.plugins.add('wysiwygarea',
        {
            requires: ['editingblock'],

            init: function (editor) {
                var fixForBody = ( editor.config.enterMode != CKEDITOR.ENTER_BR && editor.config.autoParagraph !== false )
                    ? editor.config.enterMode == CKEDITOR.ENTER_DIV ? 'div' : 'p' : false;

                var frameLabel = editor.lang.editorTitle.replace('%1', editor.name),
                    frameDesc = editor.lang.editorHelp;

                if (CKEDITOR.env.ie)
                    frameLabel += ', ' + frameDesc;

                var win = CKEDITOR.document.getWindow();
                var contentDomReadyHandler;
                editor.on('editingBlockReady', function () {
                    var mainElement,
                        iframe,
                        isLoadingData,
                        isPendingFocus,
                        frameLoaded,
                        fireMode,
                        onResize;


                    // Support for custom document.domain in IE.
                    var isCustomDomain = CKEDITOR.env.isCustomDomain();

                    // Creates the iframe that holds the editable document.
                    var createIFrame = function (data) {
                        if (iframe)
                            iframe.remove();

                        var src =
                            'document.open();' +

                                // The document domain must be set any time we
                                // call document.open().
                            ( isCustomDomain ? ( 'document.domain="' + document.domain + '";' ) : '' ) +

                            'document.close();';

                        // With IE, the custom domain has to be taken care at first,
                        // for other browers, the 'src' attribute should be left empty to
                        // trigger iframe's 'load' event.
                        src =
                            CKEDITOR.env.air ?
                                'javascript:void(0)' :
                                CKEDITOR.env.ie ?
                                'javascript:void(function(){' + encodeURIComponent(src) + '}())'
                                    :
                                    '';

                        var labelId = CKEDITOR.tools.getNextId();
                        iframe = CKEDITOR.dom.element.createFromHtml('<iframe' +
                            ' style="width:100%;height:100%"' +
                            ' frameBorder="0"' +
                            ' aria-describedby="' + labelId + '"' +
                            ' title="' + frameLabel + '"' +
                            ' src="' + src + '"' +
                            ' tabIndex="' + ( CKEDITOR.env.webkit ? -1 : editor.tabIndex ) + '"' +
                            ' allowTransparency="true"' +
                            '></iframe>');

                        // Running inside of Firefox chrome the load event doesn't bubble like in a normal page (#5689)
                        if (document.location.protocol == 'chrome:')
                            CKEDITOR.event.useCapture = true;

                        // With FF, it's better to load the data on iframe.load. (#3894,#4058)
                        iframe.on('load', function (ev) {
                            frameLoaded = 1;
                            ev.removeListener();

                            var doc = iframe.getFrameDocument();
                            doc.write(data);

                            CKEDITOR.env.air && contentDomReady(doc.getWindow().$);
                        });

                        // Reset adjustment back to default (#5689)
                        if (document.location.protocol == 'chrome:')
                            CKEDITOR.event.useCapture = false;

                        mainElement.append(CKEDITOR.dom.element.createFromHtml(
                            '<span id="' + labelId + '" class="cke_voice_label">' + frameDesc + '</span>'));

                        mainElement.append(iframe);

                        // Webkit: iframe size doesn't auto fit well. (#7360)
                        if (CKEDITOR.env.webkit) {
                            onResize = function () {
                                // Hide the iframe to get real size of the holder. (#8941)
                                mainElement.setStyle('width', '100%');
                                iframe.hide();

                                iframe.setSize('width', mainElement.getSize('width'));
                                mainElement.removeStyle('width');
                                iframe.show();
                            };

                            win.on('resize', onResize);
                        }
                    };

                    // The script that launches the bootstrap logic on 'domReady', so the document
                    // is fully editable even before the editing iframe is fully loaded (#4455).
                    contentDomReadyHandler = CKEDITOR.tools.addFunction(contentDomReady);
                    var activationScript =
                        '<script id="cke_actscrpt" type="text/javascript" data-cke-temp="1">' +
                        ( isCustomDomain ? ( 'document.domain="' + document.domain + '";' ) : '' ) +
                        'window.parent.CKEDITOR.tools.callFunction( ' + contentDomReadyHandler + ', window );' +
                        '</script>';

                    // Editing area bootstrap code.
                    function contentDomReady(domWindow) {
                        if (!frameLoaded)
                            return;
                        frameLoaded = 0;

                        editor.fire('ariaWidget', iframe);

                        var domDocument = domWindow.document,
                            body = domDocument.body;

                        // Remove this script from the DOM.
                        var script = domDocument.getElementById("cke_actscrpt");
                        script && script.parentNode.removeChild(script);

                        body.spellcheck = !editor.config.disableNativeSpellChecker;

                        var editable = !editor.readOnly;

                        if (CKEDITOR.env.ie) {
                            // Don't display the focus border.
                            body.hideFocus = true;

                            // Disable and re-enable the body to avoid IE from
                            // taking the editing focus at startup. (#141 / #523)
                            body.disabled = true;
                            body.contentEditable = editable;
                            body.removeAttribute('disabled');
                        }
                        else {
                            // Avoid opening design mode in a frame window thread,
                            // which will cause host page scrolling.(#4397)
                            setTimeout(function () {
                                // Prefer 'contentEditable' instead of 'designMode'. (#3593)
                                if (CKEDITOR.env.gecko && CKEDITOR.env.version >= 10900
                                    || CKEDITOR.env.opera)
                                    domDocument.$.body.contentEditable = editable;
                                else if (CKEDITOR.env.webkit)
                                    domDocument.$.body.parentNode.contentEditable = editable;
                                else
                                    domDocument.$.designMode = editable ? 'off' : 'on';
                            }, 0);
                        }

                        editable && CKEDITOR.env.gecko && CKEDITOR.tools.setTimeout(activateEditing, 0, null, editor);

                        domWindow = editor.window = new CKEDITOR.dom.window(domWindow);
                        domDocument = editor.document = new CKEDITOR.dom.document(domDocument);

                        editable && domDocument.on('dblclick', function (evt) {
                            var element = evt.data.getTarget(),
                                data = {element: element, dialog: ''};
                            editor.fire('doubleclick', data);
                            data.dialog && editor.openDialog(data.dialog);
                        });

                        // Prevent automatic submission in IE #6336
                        CKEDITOR.env.ie && domDocument.on('click', function (evt) {
                            var element = evt.data.getTarget();
                            if (element.is('input')) {
                                var type = element.getAttribute('type');
                                if (type == 'submit' || type == 'reset')
                                    evt.data.preventDefault();
                            }
                        });

                        // Gecko/Webkit need some help when selecting control type elements. (#3448)
                        if (!( CKEDITOR.env.ie || CKEDITOR.env.opera )) {
                            domDocument.on('mousedown', function (ev) {
                                var control = ev.data.getTarget();
                                if (control.is('img', 'hr', 'input', 'textarea', 'select'))
                                    editor.getSelection().selectElement(control);
                            });
                        }

                        if (CKEDITOR.env.gecko) {
                            domDocument.on('mouseup', function (ev) {
                                if (ev.data.$.button == 2) {
                                    var target = ev.data.getTarget();

                                    // Prevent right click from selecting an empty block even
                                    // when selection is anchored inside it. (#5845)
                                    if (!target.getOuterHtml().replace(emptyParagraphRegexp, '')) {
                                        var range = new CKEDITOR.dom.range(domDocument);
                                        range.moveToElementEditStart(target);
                                        range.select(true);
                                    }
                                }
                            });
                        }

                        // Prevent the browser opening links in read-only blocks. (#6032)
                        domDocument.on('click', function (ev) {
                            ev = ev.data;
                            if (ev.getTarget().is('a') && ev.$.button != 2)
                                ev.preventDefault();
                        });

                        // Webkit: avoid from editing form control elements content.
                        if (CKEDITOR.env.webkit) {
                            // Mark that cursor will right blinking (#7113).
                            domDocument.on('mousedown', function () {
                                wasFocused = 1;
                            });
                            // Prevent from tick checkbox/radiobox/select
                            domDocument.on('click', function (ev) {
                                if (ev.data.getTarget().is('input', 'select'))
                                    ev.data.preventDefault();
                            });

                            // Prevent from editig textfield/textarea value.
                            domDocument.on('mouseup', function (ev) {
                                if (ev.data.getTarget().is('input', 'textarea'))
                                    ev.data.preventDefault();
                            });
                        }

                        var focusTarget = CKEDITOR.env.ie ? iframe : domWindow;
                        focusTarget.on('blur', function () {
                            editor.focusManager.blur();
                        });

                        var wasFocused;

                        focusTarget.on('focus', function () {
                            var doc = editor.document;

                            if (CKEDITOR.env.gecko || CKEDITOR.env.opera)
                                doc.getBody().focus();
                            // Webkit needs focus for the first time on the HTML element. (#6153)
                            else if (CKEDITOR.env.webkit) {
                                if (!wasFocused) {
                                    editor.document.getDocumentElement().focus();
                                    wasFocused = 1;
                                }
                            }

                            editor.focusManager.focus();
                        });

                        var keystrokeHandler = editor.keystrokeHandler;
                        // Prevent backspace from navigating off the page.
                        keystrokeHandler.blockedKeystrokes[8] = !editable;
                        keystrokeHandler.attach(domDocument);

                        domDocument.getDocumentElement().addClass(domDocument.$.compatMode);
                        // Override keystroke behaviors.
                        editable && domDocument.on('keydown', function (evt) {
                            var keyCode = evt.data.getKeystroke();

                            // Backspace OR Delete.
                            if (keyCode in {8: 1, 46: 1}) {
                                var sel = editor.getSelection(),
                                    selected = sel.getSelectedElement(),
                                    range = sel.getRanges()[0],
                                    path = new CKEDITOR.dom.elementPath(range.startContainer),
                                    block,
                                    parent,
                                    next,
                                    rtl = keyCode == 8;

                                // Override keystrokes which should have deletion behavior
                                //  on fully selected element . (#4047) (#7645)
                                if (selected) {
                                    // Make undo snapshot.
                                    editor.fire('saveSnapshot');

                                    // Delete any element that 'hasLayout' (e.g. hr,table) in IE8 will
                                    // break up the selection, safely manage it here. (#4795)
                                    range.moveToPosition(selected, CKEDITOR.POSITION_BEFORE_START);
                                    // Remove the control manually.
                                    selected.remove();
                                    range.select();

                                    editor.fire('saveSnapshot');

                                    evt.data.preventDefault();
                                }
                                else {
                                    // Handle the following special cases: (#6217)
                                    // 1. Del/Backspace key before/after table;
                                    // 2. Backspace Key after start of table.
                                    if (( block = path.block ) &&
                                        range[rtl ? 'checkStartOfBlock' : 'checkEndOfBlock']() &&
                                        ( next = block[rtl ? 'getPrevious' : 'getNext'](notWhitespaceEval) ) &&
                                        next.is('table')) {
                                        editor.fire('saveSnapshot');

                                        // Remove the current empty block.
                                        if (range[rtl ? 'checkEndOfBlock' : 'checkStartOfBlock']())
                                            block.remove();

                                        // Move cursor to the beginning/end of table cell.
                                        range['moveToElementEdit' + ( rtl ? 'End' : 'Start' )](next);
                                        range.select();

                                        editor.fire('saveSnapshot');

                                        evt.data.preventDefault();
                                    }
                                    else if (path.blockLimit.is('td') &&
                                        ( parent = path.blockLimit.getAscendant('table') ) &&
                                        range.checkBoundaryOfElement(parent, rtl ? CKEDITOR.START : CKEDITOR.END) &&
                                        ( next = parent[rtl ? 'getPrevious' : 'getNext'](notWhitespaceEval) )) {
                                        editor.fire('saveSnapshot');

                                        // Move cursor to the end of previous block.
                                        range['moveToElementEdit' + ( rtl ? 'End' : 'Start' )](next);

                                        // Remove any previous empty block.
                                        if (range.checkStartOfBlock() && range.checkEndOfBlock())
                                            next.remove();
                                        else
                                            range.select();

                                        editor.fire('saveSnapshot');

                                        evt.data.preventDefault();
                                    }

                                }
                            }

                            // PageUp OR PageDown
                            if (keyCode == 33 || keyCode == 34) {
                                if (CKEDITOR.env.gecko) {
                                    var body = domDocument.getBody();

                                    // Page up/down cause editor selection to leak
                                    // outside of editable thus we try to intercept
                                    // the behavior, while it affects only happen
                                    // when editor contents are not overflowed. (#7955)
                                    if (domWindow.$.innerHeight > body.$.offsetHeight) {
                                        range = new CKEDITOR.dom.range(domDocument);
                                        range[keyCode == 33 ? 'moveToElementEditStart' : 'moveToElementEditEnd'](body);
                                        range.select();
                                        evt.data.preventDefault();
                                    }
                                }

                            }
                        });

                        // PageUp/PageDown scrolling is broken in document
                        // with standard doctype, manually fix it. (#4736)
                        if (CKEDITOR.env.ie && domDocument.$.compatMode == 'CSS1Compat') {
                            var pageUpDownKeys = {33: 1, 34: 1};
                            domDocument.on('keydown', function (evt) {
                                if (evt.data.getKeystroke() in pageUpDownKeys) {
                                    setTimeout(function () {
                                        editor.getSelection().scrollIntoView();
                                    }, 0);
                                }
                            });
                        }

                        // Prevent IE from leaving new paragraph after deleting all contents in body. (#6966)
                        if (CKEDITOR.env.ie && editor.config.enterMode != CKEDITOR.ENTER_P) {
                            domDocument.on('selectionchange', function () {
                                var body = domDocument.getBody(),
                                    sel = editor.getSelection(),
                                    range = sel && sel.getRanges()[0];

                                if (range && body.getHtml().match(/^<p>&nbsp;<\/p>$/i)
                                    && range.startContainer.equals(body)) {
                                    // Avoid the ambiguity from a real user cursor position.
                                    setTimeout(function () {
                                        range = editor.getSelection().getRanges()[0];
                                        if (!range.startContainer.equals('body')) {
                                            body.getFirst().remove(1);
                                            range.moveToElementEditEnd(body);
                                            range.select(1);
                                        }
                                    }, 0);
                                }
                            });
                        }

                        // Adds the document body as a context menu target.
                        if (editor.contextMenu)
                            editor.contextMenu.addTarget(domDocument, editor.config.browserContextMenuOnCtrl !== false);

                        setTimeout(function () {
                                editor.fire('contentDom');

                                if (fireMode) {
                                    editor.mode = 'wysiwyg';
                                    editor.fire('mode', {previousMode: editor._.previousMode});
                                    fireMode = false;
                                }

                                isLoadingData = false;

                                if (isPendingFocus) {
                                    editor.focus();
                                    isPendingFocus = false;
                                }
                                setTimeout(function () {
                                    editor.fire('dataReady');
                                }, 0);

                                // Enable dragging of position:absolute elements in IE.
                                try {
                                    editor.document.$.execCommand('2D-position', false, true);
                                } catch (e) {
                                }

                                // IE, Opera and Safari may not support it and throw errors.
                                try {
                                    editor.document.$.execCommand('enableInlineTableEditing', false, !editor.config.disableNativeTableHandles);
                                } catch (e) {
                                }
                                if (editor.config.disableObjectResizing) {
                                    try {
                                        editor.document.$.execCommand('enableObjectResizing', false, false);
                                    }
                                    catch (e) {
                                        // For browsers in which the above method failed, we can cancel the resizing on the fly (#4208)
                                        editor.document.getBody().on(CKEDITOR.env.ie ? 'resizestart' : 'resize', function (evt) {
                                            evt.data.preventDefault();
                                        });
                                    }
                                }

                                /*
                                 * IE BUG: IE might have rendered the iframe with invisible contents.
                                 * (#3623). Push some inconsequential CSS style changes to force IE to
                                 * refresh it.
                                 *
                                 * Also, for some unknown reasons, short timeouts (e.g. 100ms) do not
                                 * fix the problem. :(
                                 */
                                if (CKEDITOR.env.ie) {
                                    setTimeout(function () {
                                        if (editor.document) {
                                            var $body = editor.document.$.body;
                                            $body.runtimeStyle.marginBottom = '0px';
                                            $body.runtimeStyle.marginBottom = '';
                                        }
                                    }, 1000);
                                }
                            },
                            0);
                    }

                    editor.addMode('wysiwyg',
                        {
                            load: function (holderElement, data, isSnapshot) {
                                mainElement = holderElement;

                                if (CKEDITOR.env.ie && CKEDITOR.env.quirks)
                                    holderElement.setStyle('position', 'relative');

                                // The editor data "may be dirty" after this
                                // point.
                                editor.mayBeDirty = true;

                                fireMode = true;

                                if (isSnapshot)
                                    this.loadSnapshotData(data);
                                else
                                    this.loadData(data);
                            },

                            loadData: function (data) {
                                isLoadingData = true;
                                editor._.dataStore = {id: 1};

                                var config = editor.config,
                                    fullPage = config.fullPage,
                                    docType = config.docType;

                                // Build the additional stuff to be included into <head>.
                                var headExtra =
                                    '<style type="text/css" data-cke-temp="1">' +
                                    editor._.styles.join('\n') +
                                    '</style>';

                                !fullPage && ( headExtra =
                                    CKEDITOR.tools.buildStyleHtml(editor.config.contentsCss) +
                                    headExtra );

                                var baseTag = config.baseHref ? '<base href="' + config.baseHref + '" data-cke-temp="1" />' : '';

                                if (fullPage) {
                                    // Search and sweep out the doctype declaration.
                                    data = data.replace(/<!DOCTYPE[^>]*>/i, function (match) {
                                        editor.docType = docType = match;
                                        return '';
                                    }).replace(/<\?xml\s[^\?]*\?>/i, function (match) {
                                        editor.xmlDeclaration = match;
                                        return '';
                                    });
                                }

                                // Get the HTML version of the data.
                                if (editor.dataProcessor)
                                    data = editor.dataProcessor.toHtml(data, fixForBody);

                                if (fullPage) {
                                    // Check if the <body> tag is available.
                                    if (!(/<body[\s|>]/).test(data))
                                        data = '<body>' + data;

                                    // Check if the <html> tag is available.
                                    if (!(/<html[\s|>]/).test(data))
                                        data = '<html>' + data + '</html>';

                                    // Check if the <head> tag is available.
                                    if (!(/<head[\s|>]/).test(data))
                                        data = data.replace(/<html[^>]*>/, '$&<head><title></title></head>');
                                    else if (!(/<title[\s|>]/).test(data))
                                        data = data.replace(/<head[^>]*>/, '$&<title></title>');

                                    // The base must be the first tag in the HEAD, e.g. to get relative
                                    // links on styles.
                                    baseTag && ( data = data.replace(/<head>/, '$&' + baseTag) );

                                    // Inject the extra stuff into <head>.
                                    // Attention: do not change it before testing it well. (V2)
                                    // This is tricky... if the head ends with <meta ... content type>,
                                    // Firefox will break. But, it works if we place our extra stuff as
                                    // the last elements in the HEAD.
                                    data = data.replace(/<\/head\s*>/, headExtra + '$&');

                                    // Add the DOCTYPE back to it.
                                    data = docType + data;
                                }
                                else {
                                    data =
                                        config.docType +
                                        '<html dir="' + config.contentsLangDirection + '"' +
                                        ' lang="' + ( config.contentsLanguage || editor.langCode ) + '">' +
                                        '<head>' +
                                        '<title>' + frameLabel + '</title>' +
                                        baseTag +
                                        headExtra +
                                        '</head>' +
                                        '<body' + ( config.bodyId ? ' id="' + config.bodyId + '"' : '' ) +
                                        ( config.bodyClass ? ' class="' + config.bodyClass + '"' : '' ) +
                                        '>' +
                                        data +
                                        '</html>';
                                }

                                // Distinguish bogus to normal BR at the end of document for Mozilla. (#5293).
                                if (CKEDITOR.env.gecko)
                                    data = data.replace(/<br \/>(?=\s*<\/(:?html|body)>)/, '$&<br type="_moz" />');

                                data += activationScript;


                                // The iframe is recreated on each call of setData, so we need to clear DOM objects
                                this.onDispose();
                                createIFrame(data);
                            },

                            getData: function () {
                                var config = editor.config,
                                    fullPage = config.fullPage,
                                    docType = fullPage && editor.docType,
                                    xmlDeclaration = fullPage && editor.xmlDeclaration,
                                    doc = iframe.getFrameDocument();

                                var data = fullPage
                                    ? doc.getDocumentElement().getOuterHtml()
                                    : doc.getBody().getHtml();

                                // BR at the end of document is bogus node for Mozilla. (#5293).
                                if (CKEDITOR.env.gecko)
                                    data = data.replace(/<br>(?=\s*(:?$|<\/body>))/, '');

                                if (editor.dataProcessor)
                                    data = editor.dataProcessor.toDataFormat(data, fixForBody);

                                // Reset empty if the document contains only one empty paragraph.
                                if (config.ignoreEmptyParagraph)
                                    data = data.replace(emptyParagraphRegexp, function (match, lookback) {
                                        return lookback;
                                    });

                                if (xmlDeclaration)
                                    data = xmlDeclaration + '\n' + data;
                                if (docType)
                                    data = docType + '\n' + data;

                                return data;
                            },

                            getSnapshotData: function () {
                                return iframe.getFrameDocument().getBody().getHtml();
                            },

                            loadSnapshotData: function (data) {
                                iframe.getFrameDocument().getBody().setHtml(data);
                            },

                            onDispose: function () {
                                if (!editor.document)
                                    return;

                                editor.document.getDocumentElement().clearCustomData();
                                editor.document.getBody().clearCustomData();

                                editor.window.clearCustomData();
                                editor.document.clearCustomData();

                                iframe.clearCustomData();

                                /*
                                 * IE BUG: When destroying editor DOM with the selection remains inside
                                 * editing area would break IE7/8's selection system, we have to put the editing
                                 * iframe offline first. (#3812 and #5441)
                                 */
                                iframe.remove();
                            },

                            unload: function (holderElement) {
                                this.onDispose();

                                if (onResize)
                                    win.removeListener('resize', onResize);

                                editor.window = editor.document = iframe = mainElement = isPendingFocus = null;

                                editor.fire('contentDomUnload');
                            },

                            focus: function () {
                                var win = editor.window;

                                if (isLoadingData)
                                    isPendingFocus = true;
                                else if (win) {
                                    var sel = editor.getSelection(),
                                        ieSel = sel && sel.getNative();

                                    // IE considers control-type element as separate
                                    // focus host when selected, avoid destroying the
                                    // selection in such case. (#5812) (#8949)
                                    if (ieSel && ieSel.type == 'Control')
                                        return;

                                    // AIR needs a while to focus when moving from a link.
                                    CKEDITOR.env.air ? setTimeout(function () {
                                        win.focus();
                                    }, 0) : win.focus();
                                    editor.selectionChange();
                                }
                            }
                        });

                    editor.on('insertHtml', onInsert(doInsertHtml), null, null, 20);
                    editor.on('insertElement', onInsert(doInsertElement), null, null, 20);
                    editor.on('insertText', onInsert(doInsertText), null, null, 20);
                    // Auto fixing on some document structure weakness to enhance usabilities. (#3190 and #3189)
                    editor.on('selectionChange', function (evt) {
                        if (editor.readOnly)
                            return;

                        var sel = editor.getSelection();
                        // Do it only when selection is not locked. (#8222)
                        if (sel && !sel.isLocked) {
                            var isDirty = editor.checkDirty();
                            editor.fire('saveSnapshot', {contentOnly: 1});
                            onSelectionChangeFixBody.call(this, evt);
                            editor.fire('updateSnapshot');
                            !isDirty && editor.resetDirty();
                        }

                    }, null, null, 1);
                });

                editor.on('contentDom', function () {
                    var title = editor.document.getElementsByTag('title').getItem(0);
                    title.data('cke-title', editor.document.$.title);

                    // [IE] JAWS will not recognize the aria label we used on the iframe
                    // unless the frame window title string is used as the voice label,
                    // backup the original one and restore it on output.
                    CKEDITOR.env.ie && ( editor.document.$.title = frameLabel );
                });

                editor.on('readOnly', function () {
                    if (editor.mode == 'wysiwyg') {
                        // Symply reload the wysiwyg area. It'll take care of read-only.
                        var wysiwyg = editor.getMode();
                        wysiwyg.loadData(wysiwyg.getData());
                    }
                });

                // IE>=8 stricts mode doesn't have 'contentEditable' in effect
                // on element unless it has layout. (#5562)
                if (CKEDITOR.document.$.documentMode >= 8) {
                    editor.addCss('html.CSS1Compat [contenteditable=false]{ min-height:0 !important;}');

                    var selectors = [];
                    for (var tag in CKEDITOR.dtd.$removeEmpty)
                        selectors.push('html.CSS1Compat ' + tag + '[contenteditable=false]');
                    editor.addCss(selectors.join(',') + '{ display:inline-block;}');
                }
                // Set the HTML style to 100% to have the text cursor in affect (#6341)
                else if (CKEDITOR.env.gecko) {
                    editor.addCss('html { height: 100% !important; }');
                    editor.addCss('img:-moz-broken { -moz-force-broken-image-icon : 1;	min-width : 24px; min-height : 24px; }');
                }
                // Remove the margin to avoid mouse confusion. (#8835)
                else if (CKEDITOR.env.ie && CKEDITOR.env.version < 8 && editor.config.contentsLangDirection == 'ltr')
                    editor.addCss('body{margin-right:0;}');

                /* #3658: [IE6] Editor document has horizontal scrollbar on long lines
                 To prevent this misbehavior, we show the scrollbar always */
                /* #6341: The text cursor must be set on the editor area. */
                /* #6632: Avoid having "text" shape of cursor in IE7 scrollbars.*/
                editor.addCss('html {	_overflow-y: scroll; cursor: text;	*cursor:auto;}');
                // Use correct cursor for these elements
                editor.addCss('img, input, textarea { cursor: default;}');

                // Disable form elements editing mode provided by some browers. (#5746)
                editor.on('insertElement', function (evt) {
                    var element = evt.data;
                    if (element.type == CKEDITOR.NODE_ELEMENT
                        && ( element.is('input') || element.is('textarea') )) {
                        // We should flag that the element was locked by our code so
                        // it'll be editable by the editor functions (#6046).
                        var readonly = element.getAttribute('contenteditable') == 'false';
                        if (!readonly) {
                            element.data('cke-editable', element.hasAttribute('contenteditable') ? 'true' : '1');
                            element.setAttribute('contenteditable', false);
                        }
                    }
                });

            }
        });

    // Fixing Firefox 'Back-Forward Cache' break design mode. (#4514)
    if (CKEDITOR.env.gecko) {
        (function () {
            var body = document.body;

            if (!body)
                window.addEventListener('load', arguments.callee, false);
            else {
                var currentHandler = body.getAttribute('onpageshow');
                body.setAttribute('onpageshow', ( currentHandler ? currentHandler + ';' : '') +
                    'event.persisted && (function(){' +
                    'var allInstances = CKEDITOR.instances, editor, doc;' +
                    'for ( var i in allInstances )' +
                    '{' +
                    '	editor = allInstances[ i ];' +
                    '	doc = editor.document;' +
                    '	if ( doc )' +
                    '	{' +
                    '		doc.$.designMode = "off";' +
                    '		doc.$.designMode = "on";' +
                    '	}' +
                    '}' +
                    '})();');
            }
        })();

    }
})();

/**
 * Disables the ability of resize objects (image and tables) in the editing
 * area.
 * @type Boolean
 * @default false
 * @example
 * config.disableObjectResizing = true;
 */
CKEDITOR.config.disableObjectResizing = false;

/**
 * Disables the "table tools" offered natively by the browser (currently
 * Firefox only) to make quick table editing operations, like adding or
 * deleting rows and columns.
 * @type Boolean
 * @default true
 * @example
 * config.disableNativeTableHandles = false;
 */
CKEDITOR.config.disableNativeTableHandles = true;

/**
 * Disables the built-in words spell checker if browser provides one.<br /><br />
 *
 * <strong>Note:</strong> Although word suggestions provided by browsers (natively) will not appear in CKEditor's default context menu,
 * users can always reach the native context menu by holding the <em>Ctrl</em> key when right-clicking if {@link CKEDITOR.config.browserContextMenuOnCtrl}
 * is enabled or you're simply not using the context menu plugin.
 *
 * @type Boolean
 * @default true
 * @example
 * config.disableNativeSpellChecker = false;
 */
CKEDITOR.config.disableNativeSpellChecker = true;

/**
 * Whether the editor must output an empty value ("") if it's contents is made
 * by an empty paragraph only.
 * @type Boolean
 * @default true
 * @example
 * config.ignoreEmptyParagraph = false;
 */
CKEDITOR.config.ignoreEmptyParagraph = true;

/**
 * Fired when data is loaded and ready for retrieval in an editor instance.
 * @name CKEDITOR.editor#dataReady
 * @event
 */

/**
 * Whether automatically create wrapping blocks around inline contents inside document body,
 * this helps to ensure the integrality of the block enter mode.
 * <strong>Note:</strong> Changing the default value might introduce unpredictable usability issues.
 * @name CKEDITOR.config.autoParagraph
 * @since 3.6
 * @type Boolean
 * @default true
 * @example
 * config.autoParagraph = false;
 */

/**
 * Fired when some elements are added to the document
 * @name CKEDITOR.editor#ariaWidget
 * @event
 * @param {Object} element The element being added
 */
